Winthrop Jetty Surf Forecast

/ Massachusetts (29 breaks) / Massachusetts (28 breaks) /

USA (1297 breaks)

Surf Forecasts:

Winthrop Jetty surfForecast / Massachusetts / USA

48hr Weather and Surf, issued 7 pm Wednesday 17 Sep 2025 EDT

Forecast update in hr min s Forecast update imminent

Winthrop Jetty surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Winthrop Jetty sea temperature is 17.3° C
(Which is slightly cooler than normal)

How big are the waves at Winthrop Jetty today?

The current surf forecast for Winthrop Jetty at 12AM is: 0.4m 7s primary swell from a East-southeast direction and 0.2m 6s secondary swell from a East direction, 0.4m 4s secondary swell from a East direction (forecast issued at 07:00pm September 17). The wind direction is predicted to be cross-onshore.

Time (EDT) & Date	Wave Height	Wave Period
Morning (18 Sep)	-	-
Afternoon (18 Sep)	1ft (0.3m)	7s
Evening (18 Sep)	1.5ft (0.4m)	7s

Table - waves today at Winthrop Jetty. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Wednesday 17			Thursday 18								Friday 19								Saturday 20
	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	ESE	ESE	ESE	ESE	E	E	E	E	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	NE	NE	NE	NE	NE
Period(s) (?)	7	7	7	7	7	7	7	7	7	8	7	7	7	7	7	7	7	7	7	4	6	6	5	5
Wave Graph (?)
kJ (?)	17	17	17	16	27	24	24	26	18	19	17	17	17	16	16	16	9	9	9	19	77	59	31	25
Wind (km/h)	ENE	ENE	ENE	NNE	NNE	NNE	N	S	SE	S	WSW	W	WNW	NW	NNW	N	E	SE	N	NE	NNE	NE	ENE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	on	on	cross	cross	cross	cross	glass	cross- on	cross	off	off	cross- off	cross- off	cross- off	cross	on	cross- on	cross	cross- on	cross- on	cross- on	cross- on	on
High Tide / height (m)			8:38PM 2.95				9:25AM 2.68				9:40PM 2.98				10:18AM 2.78				10:33PM 3.01					11:03AM 2.87
Low Tide / height (m)	2:12PM 0.44				3:04AM 0.16				3:17PM 0.37				4:00AM 0.12				4:13PM 0.28				4:48AM 0.09

	Wednesday 17			Thursday 18								Friday 19								Saturday 20
Sunrise	-	-	-	-	-	6:26	-	-	-	-	-	-	-	6:26	-	-	-	-	-	-	-	6:28	-	-
Sunset	6:50	-	-	-	-	-	-	-	6:49	-	-	-	-	-	-	-	6:46	-	-	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	18	17	17	17	17	17	18	22	24	21	20	20	19	19	23	24	21	18	17	16	15	14	15	16
Feels °C (?)	18	17	18	18	18	18	19	24	24	21	19	18	17	17	21	22	20	18	14	12	11	10	11	12

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Massachusetts

Wind Update Continuing clean conditions at Winthrop Jetty (calm at Winthrop 4 km from Winthrop Jetty). 0.5m 7s swell from the ESE with a 0.3m 3s local chop from the E and a 0.2m 8s swell, also from the E. 3 swells combining to make bigger set waves.
1 hour 46 minutes ago Winthrop Jetty

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1 h 46 min ago

0 km/h

Clean

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